3 Phase Surge Protection Device Unit with 8 Way Metal IP40 enclosure 63A MCB

Pre-wired in the UK and tested before dispatch – allow up to 3 working days for shipping.

The WMCUSP463C is a ready-to-fit 3-Phase Surge Protection Device (SPD) Unit supplied in an 8-way IP40 steel enclosure. It includes a 4-pole Type 2 SPD (20kA/40kA) paired with a 63A MCB, delivering overcurrent protection and transient surge suppression for higher load installations. Built to BS 7671:2018 Amendment 2, this board is designed for larger commercial and industrial sites, EV charging hubs, and renewable installs where demand exceeds 40A.

Why Choose the 63A MCB Variant?

This unit is designed for higher current capacity while still delivering Type 2 surge suppression. It’s the ideal choice where circuits draw beyond 40A, but upstream earth leakage protection is already handled by separate RCDs or RCBOs. This makes it:

• Load-ready — built for heavier commercial/industrial demand
• Future-proof — covers expansion in EV or renewable systems
• Compliant — tested to BS EN 61439-3 and BS 7671 Amd 2
• Installer-friendly — pre-wired, labelled, and built to order in the UK

Key Features

• 63A MCB: 10kA, C Curve overcurrent protection
• Type 2 SPD: 4-pole, rated 20kA/40kA
• 8-way IP40 Enclosure: Steel, surface mount with neutral/earth bars
• Pre-wired in the UK: Built and tested before dispatch
• Compliance: BS EN 61439-3 · IEC 61643 · BS 7671 Amd 2

Variant Comparison

• Enclosure: 8-way steel, IP40 rated, surface mount
• SPD: 4-pole Type 2, 20kA/40kA
• MCB: 63A, 10kA, C Curve
• Neutral/Earth: Full bars included inside enclosure
• Pre-Wiring: Built and tested in the UK
• Compliance: BS EN 61439-3 · IEC 61643 · BS 7671:2018 Amendment 2

This unit is built to order and pre-wired in our UK facility. Installation must be carried out by a qualified electrician.

• Mount vertically on a dry indoor surface using metal enclosure fixings
• Confirm earthing arrangement (TN-C-S or TT) before energising
• Rear and side knockouts provided for flexible cable entry
• SPD earth connection must be kept as short as possible to minimise let-through voltage
• Wiring schematic is supplied inside the enclosure lid for reference

When should I use the 63A MCB version?

Choose this unit when your three-phase installation exceeds 40A demand, such as larger commercial, industrial, or multi-point EV charging installs. It provides overcurrent protection plus Type 2 surge suppression at the origin.

Does it include earth leakage protection?

No - this variant provides overcurrent protection only. If earth leakage protection is required, use the 40A RCD version or the 40A RCBO version for combined coverage.

Is this compliant with the 18th Edition?

Yes – the WMCUSP463C is designed and tested to BS 7671:2018 Amendment 2, with a 4-pole Type 2 SPD included as standard.

Does it come with neutral and earth bars?

Yes – the enclosure includes full DIN rail, neutral bar, and earth bar for straightforward installation.

How quickly will it ship?

Units are pre-wired to order and normally dispatched within 3 working days. Each board comes with a 2-year manufacturer warranty.